Religious conversion is the adoption of a set of beliefs identified with one particular religious denomination to the exclusion of others. Thus "religious conversion" would describe the abandoning of adherence to one denomination and affiliating with another. This might be from one to another denomination within the same religion, for example, ChristianBaptist to Methodist or Catholic,[1]MuslimShi'a to Sunni.[2] In some cases, religious conversion "marks a transformation of religious identity and is symbolized by special rituals".[3]

Conversion or reaffiliation for convenience is an insincere act, sometimes for relatively trivial reasons such as a parent converting to enable a child to be admitted to a good school associated with a religion, or a person adopting a religion more in keeping with the social class he or she aspires to.[5] When people marry one spouse may convert to the religion of the other.

Forced conversion is adoption of a different religion under duress. The convert may secretly retain the previous beliefs and continue, covertly, with the practices of the original religion, while outwardly maintaining the forms of the new religion. Over generations a family forced against their will to convert may wholeheartedly adopt the new religion.

Proselytism is the act of attempting to convert by persuasion another individual from a different religion or belief system. (See proselyte).

Apostate is a term used by members of a religion or denomination to refer to someone who has left that religion or denomination.

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Jewish law has a number of requirements of potential converts. They should desire conversion to Judaism for its own sake, and for no other motives. A male convert needs to undergo a ritual circumcision conducted according to Jewish law (if already circumcised, a needle is used to draw a symbolic drop of blood while the appropriate blessings are said), and there has to be a commitment to observe Jewish law. A convert must join the Jewish community, and reject the previous theology he or she had prior to the conversion. Ritual immersion in a small pool of water known as a mikvah is required.

In Hellenistic and Roman times, some Pharisees were eager proselytizers, and had at least some success throughout the empire.

Some Jews are also descended from converts to Judaism outside the Mediterranean world. It is known that some Khazars, Edomites, and Ethiopians, as well as many Arabs, particularly in Yemen. The word "proselyte" originally meant a Greek who had converted to Judaism. As late as the 6th century the Eastern Roman empire and Caliph Umar ibn Khattab were issuing decrees against conversion to Judaism, implying that this was still occurring.[6]

Conversion to Christianity is the religious conversion of a previously non-Christian person to some form of Christianity. The exact requirements vary between different churches and denominations. The process of converting to Catholicism involves religious education followed by initial participation in the sacraments. In general, conversion to Christian Faith primarily involves repentance for sin and a decision to live a life that is holy and acceptable to God through faith in the atoning death and resurrection of Jesus Christ. All of this is essentially done through a voluntary exercise of the will of the individual concerned. True conversion to Christianity is thus a personal, internal matter and can never be forced. Converts are almost always expected to be baptized.

Christians consider that conversion requires internalization of the new belief system. It implies a new reference point for the convert's self-identity, and is a matter of belief and social structure—of both faith and affiliation.[7] This typically entails the sincere avowal of a new belief system, but may also present itself in other ways, such as adoption into an identity group or spiritual lineage.

Catholics, and Orthodox denominations encourage infant baptism before children are aware of their status. In Roman Catholicism and certain high church forms of Protestantism, baptized children are expected to participate in confirmation classes as pre-teens. In Eastern Orthodoxy, the equivalent of confirmation, chrismation, is administered to all converts, adult and infant alike, immediately after baptism.

Methods of baptism include immersion, sprinkling (aspersion) and pouring (affusion).[8] Baptism received by adults or younger people who have reached the age of accountability where they can make a personal religious decision is referred to as believer's baptism among conservative or evangelical Protestant groups. It is intended as a public statement of a person's prior decision to become a Christian.[9] Some Christian groups such as Catholics, Churches of Christ, and Christadelphians believe baptism is essential to salvation.

The Augsburg Confession divides repentance into two parts: "One is contrition, that is, terrors smiting the conscience through the knowledge of sin; the other is faith, which is born of the Gospel, or of absolution, and believes that for Christ's sake, sins are forgiven, comforts the conscience, and delivers it from terrors."[10]

“Conversion” derives from the Latinconversiōn-em, literally meaning “turning round” and figuratively meaning a “change in character”.[11] “Change of heart”, “metanoia”, and “regeneration” are among the synonyms for conversion.[12] Conversion is, therefore, more than a mere change in religious identity, but a change in nature (regeneration), evidenced by a change in values. Jesus demands "metánoia (conversion)" to become a good tree that bears good fruit (Matthew 7:17–18, [Luke 6:43]).[13]

According to Christianity, a convert renounces sin as worthless and treasures instead the supreme worth of Christ in Jesus' sacrificial death and resurrection.[14] Christian conversion is a “deeply personal” matter. It entails changes in thinking, priorities and commitments: “a whole new direction in one's life”.[15]

Because conversion is a change in values that embraces God and rejects sin, it includes a personal commitment to a life of holiness as described by Paul of Tarsus and exemplified by Jesus. In some Protestant traditions, this is called "accepting Christ as one's Savior and following him as Lord."[16] In another variation, the 1910 Catholic Dictionary defines "conversion" as "One who turns or changes from a state of sin to repentance, from a lax to a more earnest and serious way of life, from unbelief to faith, from heresy to the true faith."[17] The Eastern Orthodox understanding of conversion is illustrated in the rite of baptism, in which the convert faces west while publicly renouncing and symbolically spitting upon Satan, and then turns to the east to worship Christ "as king and God".[18]

Transferring from one Christian denomination to another may consist of a relatively simple transfer of membership, especially if moving from one Trinitarian denomination to another, and if the person has received water baptism in the name of the Trinity. If not, then the person may be required to be baptized or rebaptized before acceptance by the new church. Some denominations, such as those in the Anabaptist tradition, require previously baptized Christians to be re-baptized. The Eastern Orthodox Church treats a transfer from another denomination of Christianity to Orthodoxy (conceived of as the one true Church) as a category of conversion and repentance, though re-baptism is not always required.

The process of conversion to Christianity varies somewhat among Christian denominations. Most Protestants believe in conversion by faith to attain salvation. According to this understanding, a person professes faith in Jesus Christ as God, their Lord and savior. Repentance for sin and a holy living are expected of those professing faith in Jesus Christ. While an individual may make such a decision privately, usually it entails being baptized and becoming a member of a denomination or church. In these traditions, a person is considered to become a Christian by publicly acknowledging the foundational Christian doctrines that Jesus Christ died, was buried, and was resurrected for the remission of sins.[citation needed]

Much of the theology of Mormon baptism was established during the early Latter Day Saint movement founded by Joseph Smith, Jr. According to this theology, baptism must be by immersion, for the remission of sins (meaning that through baptism, past sins are forgiven), and occurs after one has shown faith and repentance. Mormon baptism does not purport to remit any sins other than personal ones, as adherents do not believe in original sin. Mormon baptisms also occur only after an "age of accountability" which is defined as the age of eight years.[22] The theology thus rejects infant baptism.[23]

In addition, Mormon theology requires that baptism may only be performed with one who has been called and ordained by God with priesthood authority.[24] Because the churches of the Latter Day Saint movement operate under a lay priesthood, children raised in a Mormon family are usually baptized by a father or close male friend or family member who has achieved the office of priest, which in Mormonism is conferred upon worthy male members at least 16 years old.[25]

Baptism is seen as symbolic both of Jesus' death, burial and resurrection[26] and is also symbolic of the baptized individual putting off of the natural or sinful man and becoming spiritually reborn as a disciple of Jesus.

Membership into a Latter Day Saint church is granted only by baptism whether or not a person has been raised in the church. Latter Day Saint churches do not recognize baptisms of other faiths as valid because they believe baptisms must be performed under the church's unique authority. Thus, all who come into one of the Latter Day Saint faiths as converts are baptized, even if they have previously received baptism in another faith.

When performing a Baptism, Latter Day Saints say the following prayer before performing the ordinance:

Having been commissioned of Jesus Christ, I baptize you in the name of the Father, and of the Son, and of the Holy Ghost. Amen[27]

Baptisms inside and outside the temples are usually done in a baptistry, although they can be performed in any body of water in which the person may be completely immersed. The person administering the baptism must recite the prayer exactly, and immerse every part, limb, hair and clothing of the person being baptized. If there are any mistakes, or if any part of the person being baptized is not fully immersed, the baptism must be redone. In addition to the baptizer, two priesthood holders witness the baptism to ensure that it is performed properly.[28]

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Islam teaches that everyone is Muslim at birth[31][32] because every child that is born has a natural inclination to goodness and to worship the one true God alone, but his or her parents or society can cause him or her to deviate from the straight path. When someone accepts Islam he/she is considered to revert to his/her original condition. While conversion to Islam is among its most supported tenets, conversion from Islam to another religion is considered to be the sin of apostasy. In several Muslim majority countries it is subject to the death penalty or heavy punishments. In Islam, circumcision is a Sunnah custom not mentioned in the Quran. The primary opinion is that it is not obligatory and is not a condition for entering into Islam. The Shafi`i and Hanbali schools regard it as obligatory, while the Maliki and Hanafi schools regard it as only recommended. However, it is not a precondition for the acceptance of a person's Islamic practices, nor does one sin if choosing to forgo circumcision. It is not one of the Five Pillars of Islam or the Six Fundamentals of Belief.[33][34][35]

In sharing their faith with others, Bahá'ís are cautioned to "obtain a hearing" – meaning to make sure the person they are proposing to teach is open to hearing what they have to say. "Bahá'í pioneers", rather than attempting to supplant the cultural underpinnings of the people in their adopted communities, are encouraged to integrate into the society and apply Bahá'í principles in living and working with their neighbors.

Bahá'ís recognize the divine origins of all revealed religion, and believe that these religions occurred sequentially as part of a Divine plan (see Progressive revelation), with each new revelation superseding and fulfilling that of its predecessors. Bahá'ís regard their own faith as the most recent (but not the last), and believe its teachings – which are centered around the principle of the oneness of humanity – are most suited to meeting the needs of a global community.

In most countries conversion is a simple matter of filling out a card stating a declaration of belief. This includes acknowledgement of Bahá'u'llah – the Founder of the Faith – as the Messenger of God for this age, awareness and acceptance of His teachings, and intention to be obedient to the institutions and laws He established.

Conversion to the Bahá'í Faith carries with it an explicit belief in the common foundation of all revealed religion, a commitment to the unity of mankind, and active service to the community at large, especially in areas that will foster unity and concord. Since the Bahá'í Faith has no clergy, converts to this Faith are encouraged to be active in all aspects of community life. Even a recent convert may be elected to serve on a Local Spiritual Assembly – the guiding Bahá'í institution at the community level.[36][37]

Clear concepts of proselytization and conversion play a marginal role in practice. Early in their history, in the absence of other competing religions, Hindus considered everyone they came across as Hindu and expected everyone they met to be Hindu.[38][39] Another opinion holds that early in their history, there was no single strain of belief system that could be called Hinduism, and this diversity created a natural inclination for tolerance in Hinduism.[citation needed]

Hindus today continue to be influenced by historical ideas of acceptability of conversion.[40] Hence, many Hindus continue to believe that Hinduism is an identity obtained by birth,[41] while many others continue to believe that anyone who follows Hindu beliefs and practices is a Hindu,[42] and many believe in some form of both theories. However, as a reaction to perceived and actual threat proselytization activities of other major religions many modern Hindus are opposed to the idea of conversion from (any) one religion to (any) other per se.[43] However, Hindus in western countries generally accept and welcome willing converts, whereas in India acceptance of willing converts is becoming more common.[44]

There is no formal process for converting to Hinduism, although in many traditions a ritual called dīkshā ("initiation") marks the beginning of spiritual life.[45] A ritual called shuddhi ("purification") sometimes marks the return to spiritual life after reconversion.[46] Most Hindu sects do not seek converts,[47][48][49][50] as they believe that the goals of spiritual life can be attained through any religion, as long as it is practiced sincerely.[47][51] However, the persons converting to Hinduism normally perform "Yagna" or "Homa" (i.e., fire rituals) under guidance of local Hindu priests and after which the said person is considered to be Hindu and there are some Hindu sects and affiliates such as Arya Samaj, Saiva Siddhanta Church, BAPS, and the International Society for Krishna Consciousness accept those who have a desire to follow Hinduism.

Jainism accepts anyone who wants to embrace the religion. There is no specific ritual for becoming a Jain. One does not need to ask any authorities for admission. One becomes a Jain on their own by adopting the five vows. Following the five vows is the basic requirement in following Jainism. All other aspects, such as visiting temples, becoming a monk, etc. are secondary.

Persons newly adhering to Buddhism traditionally "take Refuge" (express faith in the Three Jewels—Buddha, Dharma, and Sangha) before a monk, nun, or similar representative. But cultural or secular Buddhists often hold multiple religious identities, combining the religion with some East Asian religions in different countries and ethnics, such as:

In the second half of the 20th century, the rapid growth of new religious movements (NRMs) led some psychologists and other scholars to propose that these groups were using "brainwashing" or "mind control" techniques to gain converts. This theory was publicized by the popular news media but disputed by other scholars, including some sociologists of religion.[72][73][73][74][75][76]

In the 1960s sociologist John Lofland lived with Unification ChurchmissionaryYoung Oon Kim and a small group of American church members in California and studied their activities in trying to promote their beliefs and win converts to their church. Lofland noted that most of their efforts were ineffective and that most of the people who joined did so because of personal relationships with other members, often family relationships.[77] Lofland published his findings in 1964 as a doctoral thesis entitled "The World Savers: A Field Study of Cult Processes", and in 1966 in book form by Prentice-Hall as Doomsday Cult: A Study of Conversion, Proselytization, and Maintenance of Faith. It is considered to be one of the most important and widely cited studies of the process of religious conversion, and one of the first modern sociological studies of a new religious movement.[78][79]

The Church of Scientology attempts to gain converts by offering "free stress tests".[80] It has also used the celebrity status of some of its members (most famously the American actor Tom Cruise) to attract converts.[81][82] The Church of Scientology requires that all converts sign a legal waiver which covers their relationship with the Church of Scientology before engaging in Scientology services.[83]

On the other end of the scale are religions that do not accept any converts, or do so very rarely. Often these are relatively small, close-knit minority religions that are ethnically based such as the Yazidis, Druze, and Mandaeans. Zoroastrianism classically does not accept converts, but this issue has become controversial in the 20th century due to the rapid decline in membership.[citation needed]Chinese traditional religion lacks clear criteria for membership, and hence for conversion. The Shakers and some Indian eunuch brotherhoods do not allow procreation, so that every member is a convert.

The United NationsUniversal Declaration of Human Rights defines religious conversion as a human right: "Everyone has the right to freedom of thought, conscience and religion; this right includes freedom to change his religion or belief" (Article 18). Despite this UN-declared human right, some groups forbid or restrict religious conversion (see below).

Based on the declaration the United Nations Commission on Human Rights (UNCHR) drafted the International Covenant on Civil and Political Rights, a legally binding treaty. It states that "Everyone shall have the right to freedom of thought, conscience and religion. This right shall include freedom to have or to adopt a religion or belief of his choice" (Article 18.1). "No one shall be subject to coercion which would impair his freedom to have or to adopt a religion or belief of his choice" (Article 18.2).

The UNCHR issued a General Comment on this Article in 1993: "The Committee observes that the freedom to 'have or to adopt' a religion or belief necessarily entails the freedom to choose a religion or belief, including the right to replace one's current religion or belief with another or to adopt atheistic views [...] Article 18.2 bars coercion that would impair the right to have or adopt a religion or belief, including the use of threat of physical force or penal sanctions to compel believers or non-believers to adhere to their religious beliefs and congregations, to recant their religion or belief or to convert." (CCPR/C/21/Rev.1/Add.4, General Comment No. 22.; emphasis added)

Some countries distinguish voluntary, motivated conversion from organized proselytism, attempting to restrict the latter. The boundary between them is not easily defined: what one person considers legitimate evangelizing, or witness-bearing, another may consider intrusive and improper. Illustrating the problems that can arise from such subjective viewpoints is this extract from an article by Dr. C. Davis, published in Cleveland State University's Journal of Law and Health: "According to the Union of American Hebrew Congregations, Jews for Jesus and Hebrew Christians constitute two of the most dangerous cults, and its members are appropriate candidates for deprogramming. Anti-cult evangelicals ... protest that 'aggressiveness and proselytizing ... are basic to authentic Christianity,' and that Jews for Jesus and Campus Crusade for Christ are not to be labeled as cults. Furthermore, certain Hassidic groups who physically attacked a meeting of the Hebrew Christian 'cult' have themselves been labeled a 'cult' and equated with the followers of Reverend Moon, by none other than the President of the Central Conference of American Rabbis."[86]

^Melton, J. Gordon (1999-12-10). "Brainwashing and the Cults: The Rise and Fall of a Theory". CESNUR: Center for Studies on New Religions. Retrieved 2009-06-15. In the United States at the end of the 1970s, brainwashing emerged as a popular theoretical construct around which to understand what appeared to be a sudden rise of new and unfamiliar religious movements during the previous decade, especially those associated with the hippie street-people phenomenon.